I've read that Redline Fuel injection cleaner is very good.

I've also read that Honda/Acura sells something called K44 which is supposed to be very good.

Now, do these things really work? What are the pros and cons? Anyone do their own testing and research on this?

 

also try regaine, made by penzoil/gumout. i used it after a tank of gas and i could actually see a difference when i pulled the plugs out and look on the piston tops. another one that i liked was lucas fuel injector cleaner. i've used the redline sl-1? intake valve/injector cleaner and i didnt think it worked as good as these two

 

I've always had great results with Techron.

You can find it at Pep Boys and Chevron gas stations. For some reason our 00 Maxima would ping under load. Added a bottle and now it's running great.

 

Regane (note proper spelling)
Usually Pepboys had it, but Autozone is now carrying it.

 

I have had good luck luck with Techron Concentrate

 

Techron has worked really well for me also. Just as good as Regane.